Box motion for looms



June 1930- w. E; LUNDGREN v1,760,950

BOX MOTION won LOoMs Filed Aug. 1, 1928 a Sheets-Sheet 1 i9 7. w/m Ely/4 mm June 3, 1930.

Filed Aug. 1, 1928 3 Sheets -Sheet 2 June 3, 1930; w. E. LUNDGREN Filed Aug. 1928 3 Sheets-Sheet s 9 w E hm W Q in the drawings in vvhich-4 Patented June 3, 193

WILLIAM E'LUNIDGREN, OF WonoEs'rEn, MASS CHUSE TS;:AssIGNoRTTo' c'noiu1=.'.ro1\T;4,1*

' "KNOWLES Loom woRKs,--oF,-.wo1acusrr1n, mnssncnusn'rrs, .A ,oonronnrrfonulorf J;

AssAcHUsETTs 1 Application filed August. 1,

This invention relates to a mechanism for raising and lowering the shuttle boxesfin dropboxloom. j j

It is the generalobject of myjinve'n'tion to",

improve and simplify the construction of V such, box 'm'otions; reducing the number of f 1 partsand simplifying the manufacture andassembly thereof. 1 T f j With this general obj ect in vieW,important features of my invention relate to the proviprovision of improved devices for. sliding the pinions'tarting teeth; to improveclmeans for holding said pin'ionsin' predetermined-angular positions, and to other details of construction which Will be hereinafter described and more particularly pointed out in the appended m ,1 y v 'Apreferred" form of the inyentionis shown Fig. 1 is a side elevation of portions of a loom having myimp'roved box motion mountedthereonf I l 1 Fig. 2 is an enlarged end "viefvv oftlie boxl motion, with ce'rtainp'arts broken'avvay ,Fig. 3 is'a sectionalrear elevationi taken along the line 33in Fig; 2;, "f g Fig. 4'isa sectional frontelevationytaken along the line 4 4inFig. 2;" 1

Fig. 5 is a detail sectional View, taken along the line 5''5 in Fig. 4;

.Fig. 6 is a side ,elevi tion of the giveay T device;'and" I g Fig. 7 V is a detail sectional view,

along the'line7,7 in Fig. 3., I

Referring to the dravvings,-."I have i shown parts of a drop box loom' including'a loom 3 e ti frame 10, and drop boxes 11 mounted on a lifter rod 12 and slidable in a lower bear-f ing 13, all of said parts beingof the 'usual construction; v

A lifter lever 14 is mounted on a V pivot 15 and is connected'bya link l6 to the lower endof the lifter rod 12. The'weight balances the drop boxes-11 and lifter rod 121 The lifter lever 14 is connected by a link i 18 to acrankpin 19, (Fig. 2) on the rear pin 7 ion shaft 20. The floating pivot15 is mountion" mechanism shownin Fig. 3 will apply.

equallyto theconstruction"offthe frontpinf' sion of an improved give-Way device'; to the stand or frame F. I

17 at the rear end of the lever 14 counter-- 'ed on a lever 22 (Fig. 1) pivoted to thelo'om BOX Morton non roomsfl 1928. ser al N 25 ,759.. l

at 23 andconnected by 5111111: 724440 cranlopin 25 on aifron t pinion shaft 26.

The construction {for the'front and'reai pinions and their associated fmechanisms is ldentloal'and a descrlptlon of the rear pin- 1on mechanism.

Referring to Fig. 3, thejpmm adage '1 srotatable in, a bushing 30, in a bearing; 31. forming an integral The stud 19 is fixed extendingthrough the hub 34' of the cam 32.

part, for the 1010;: motion" if v a' cam- 5 l arm formed in the Shape of 3 Cam 32 securedf f:

tothe end of the-shaft'20 by ataperpin 33 5 7 The hub 34 is provided With flattened "per-g1 tions 35 (Fig. 7 at opposite sidesthereof. I which are normally engaged by a flat fspring 36 mounted on a fixed supportfi'i; said spring being fori-a purpose tobedescribed.

.Theusualintermitte'nt or mutilated pinion L'g'ear 40 Fig. 3) is fixed nearthe opposite endof the shaft-20, as by a pin 41. Agro oved I collar :42 slidable' adj acent the pinion 40 and constitutes means for sliding. the starting eeth 44 2) of the pinion axially; Q P into and out ofoperative'positionr v The collar 42 isbontrOlledby ayokearni: j 45. mounted on the endor e Stud 461(F-ig. 3 which is slidableinanelongated bearing poi;- 1; 1 tion 48 ofthe frame :A' spring 5O slur;

rounds the reduced end of thefstud 46and is; 1

collar42tofthe left, as indicated in Movement tov theri'ght iscaused by aeer'd-f mechanism, not shown", 1

enclosed in'the bearing soi thatit is entirely," fprotected from .dirt orin-juryf Thezspring. 5Q acts to yieldingly move the yoke 45.;andf

" l epa tm Y -When the pinion 40 is to be rendered-oper I ative, the collar 42 ijpermitted to slide to i theleft underithe influence of the spring 50,

causing the, starting teeth -44tobe-broughtf v intoi positlon for engagement the corre sponding teeth of a driving gear, .(Fig. 2) p on thebottom or camshaft 61 of the loom.

stop motionplatefio islmounted-Iat. the

operating locking part 66 of the hub of the side. of each pinion 4C0 and engages a coportions 72'adapted to receive the concentric portion 68 of the locking part 66, when the partsare positioned 'asshOvvn in Fig. 5.

ions yieldingly in such position that the stop vmotion plate 65 is held from turning, as the recess 69 passes under the corner of the plate.

VVhen one of the sliding teeth is moved to operative position, however, the stop plate 65 will be positively rotated, and the corner of the plate 65 then 's'vvingsinto the recess 69% in the Well known Geneva stop motion.

vvillthusbe see'n that I have provided a 7 positive stop motion which will absolutely prevent overrunning of the pinion gears at I I any speed of operation.

The recesses 74: for the stop motion plate 75 1 on the'front pi'ni'ensh'aft 26 are similar to the recesses 69 and 70, but are formed in a di'lieri'ent radial section, the plates 65 and .7 beingout of alignment.

It is desirable to provide a give-Way device in case the indicated motion of the drop boxes is prevented and it has been customary to provide an expensive yielding bearing constr'uction for each of the pinion shafts and 26. In my improved box motioml mount the pinion shafts 2 0 and 26, as Well as the cam.

shaft 61 in fixed hearings in the frame F and provide a much simplified and improved give-Way device for the main driving gear 60. I

For this purpose I mount the gear loose N on the bottom shaft 61 and provide the {gear 46 6O witha locking arm 80 6) having a lug orjprojecti'on 8 1 adaptedto'enter a notch 82 in a collar 83 fixed to. the shaft61'.

A spring 85' connects the lever 18O to a stud 86 on the end of the drivin-ggear, saidspring overlying in part a hub portion 87 project- I ingfromtheend ofthe ge a'rGO. Under normal conditions, "the lug. 81 will he held firmly in the notch. 82 and the driving gear will rotate With the cam shaft 61. If, however,"

movementof thedropboxes or pinion shafts is prevented, the lug 81 vvi1-l be forced out of 'the'notch 82, thus freeing the camshaft from the drivin -gear; As soon asthe lug Slrnoves out of the notch 82, it rests upona concentric surface'of the {collar 83 and offers very little resistaneeto continued turning of the bottom cream-shaft 61.

Whenit is desired tojrestore the driving connection, the bottom shaft is turned until the lug 81 dropsinto the notch, and as the bottom shaft makes one revolution for each two picks of the loom,- the'd-riving gear is always restored incorrect angular relation and proper timing, a feature not found With the previous yield-ing'box construction which proved construction embodies advantages not found in the previous box motions. When a pinion shaft bearing becomes Wormit can The flat'spr-ing 36 7) holds the pins be easily repaired by first driving out the pin 33 and removing the crankcam 3E2- The shaft 20 is then removed, after which the bushing 30 may be forced out and a new bushing substitute'cl. I

Havingthus described my invention and the advantages thereof, Ifdo not Wishtojbe limited to the details herein di's'clo'sed, other'- Wise than as set forth in the claims, but What I claim is: p f U 1. In a box motion, a ,pinien ea'r, starting teeth therefor, and means tor'nove saidsta'rting teeth axially, said meansc'ompris ing a yoke arm, and a spring actuated plunger on WlllCliSZtlQl yo r'e arm is mounted, saidplunger being effective to give saidarm a straight line movement axially of said gear.

2. In abox motion, a mutilated pinion, interrupted driving gear', Genefva-stop mo"- tion devices associated with said pinion and gear to periodically hold said pinionfr'o'm rotation for a portion of a revolution, and addi= tional' yielding means effective to holdsaii'd pinion from accidental rotation when said Geneva stop motion devicesare ineile'ctive' to prevent such accidental rotation V 3. In a box motion, a mutilated pinion, an interrupted driving gear, Geneva 'stop mo tion devices associated With said pinion gear to periodically hold jsaid pinion from rotation for a portion of a revolution, said pinion having a crank arm associated therewith havingla hubvvith; flattened peripheral portions, and a flat spring mounted in fixed posit-ion and yieldi'ngly engaging said fiat hub'porti'o'ns to hold said pinion 'froin'accidental angular'movement when said Geneva stop motion devices are inetl'ective to prevent such accidentalrotation,

In testimony whereof have" hereuhto WILLIAM'E. LUNDGRE'N.

affixed my signature. 

